How radioactive are the Super Takumars?

Thank you everybody for guick and very knowledgeable answers! So radiation is not a problemn in this case. Do you have any views how best to get rid of this yellowish hue on the lens. The seller said to me that if you put the lens on a window sill for a couple of days this would clear the hue. I know that UW-radiation would do the work, but through the window? Does anybody have a good arrengement to get rid of this hue?

Different kind of radiation, actually, ...the difference is real, but what your cell puts out isn't officially called 'radiation. ' Tidy, eh?

OK, so cell phone radiation is non-ionizing. I stand corrected.

Someone else used a smoke detector as an example.

Most smoke detectors sold in America contain americium-241, a radioactive element with a half-life of 432 years. You get more ionizing radiation protecting yourself from dying of smoke inhalation in a house fire than you get changing a Super Takumar lens.